国外知识组织体系管理工具比较分析与启示     

纪姗姗  赵炳容  刘峥 《图书情报工作》2021,64(24):73-83

[目的/意义] 比较分析语义网技术发展环境下国外代表性知识组织体系管理工具的研究现状及关键功能，梳理相关研究的发展趋势。[方法/过程] 通过网络调研法，遴选国外10个代表性知识组织体系管理工具，从结构定义、项目维护、数据管理、互操作性、操作环境等方面比较分析其发展现状。在此基础上，为国内知识组织体系管理工具的建设工作提供建议。[结果/结论] 研究发现，国内知识组织体系管理工具的建设工作应依托语义网、关联数据、语义集成、语义互操作等技术促进功能创新，包括：灵活设计并配置多类型数据模型、支持可持续发展的管理与维护机制、支持用户分布式协同管理与控制、知识驱动的数据迭代式更新、面向语义的KOS重用与进化、建设以KOS为核心的知识组织框架等。  相似文献   

开放教育教师知识共享意愿研究     

沈际 《滁州职业技术学院学报》2020,(1):22-25

人在漫长的学习生涯中学习知识,并通过知识共享加速知识积累,开放教育教师所拥有的教学经验是其在长期的教学实践过程中积累的技巧或窍门,他们对知识共享既期待又有顾虑,实现知识共享的技术手段也各有偏好。  相似文献   

Coupled matrix factorization and topic modeling for aspect mining     

Ding Xiao  Yugang Ji  Yitong Li  Fuzhen Zhuang  Chuan Shi 《Information processing & management》2018,54(6):861-873

Aspect mining, which aims to extract ad hoc aspects from online reviews and predict rating or opinion on each aspect, can satisfy the personalized needs for evaluation of specific aspect on product quality. Recently, with the increase of related research, how to effectively integrate rating and review information has become the key issue for addressing this problem. Considering that matrix factorization is an effective tool for rating prediction and topic modeling is widely used for review processing, it is a natural idea to combine matrix factorization and topic modeling for aspect mining (or called aspect rating prediction). However, this idea faces several challenges on how to address suitable sharing factors, scale mismatch, and dependency relation of rating and review information. In this paper, we propose a novel model to effectively integrate Matrix factorization and Topic modeling for Aspect rating prediction (MaToAsp). To overcome the above challenges and ensure the performance, MaToAsp employs items as the sharing factors to combine matrix factorization and topic modeling, and introduces an interpretive preference probability to eliminate scale mismatch. In the hybrid model, we establish a dependency relation from ratings to sentiment terms in phrases. The experiments on two real datasets including Chinese Dianping and English Tripadvisor prove that MaToAsp not only obtains reasonable aspect identification but also achieves the best aspect rating prediction performance, compared to recent representative baselines.  相似文献   

Students’ perceptions of an interdisciplinary global study tour: uncovering inexplicit employability skills     

Rachael Hains-Wesson  Kaiying Ji 《高等教育研究与发展》2020,39(4):657-671

ABSTRACT

For higher education graduates to be effective in the workplace, they require strong technical skills and the capability to operate across diverse knowledge landscapes to solve real world problems. At an Australian university, an interdisciplinary, short-term study tour programme was utilised to enhance students’ inexplicit employability skills with a focus on managing complexity while developing agility and creativity. To investigate the effectiveness of such a programme, we examined students’ perceptions of an interdisciplinary teamwork assessment task that was undertaken in an international context via a study tour model. We achieved this by, first, introducing a purposely designed interdisciplinary teamwork assessment task, which focused on students presenting innovative ideas to peers and industry members. Second, we elicited student responses via a case study approach that incorporated mixed methods, utilising several data collection instruments prior to, during, and after students participated in a study tour. The findings suggest that integrating a purposely designed interdisciplinary teamwork assessment task, via a short-term study tour model, uncovered certain inexplicit employability skills, namely managing complexity, developing agility and creativity. We make specific recommendations to support this insight, contributing to the mobility teaching and learning research field.  相似文献   

Ferulic acid prevents liver injury and increases the anti-tumor effect of diosbulbin B in vivo   总被引：1，自引：0，他引：1  

Jun-ming WANG  Yu-chen SHENG  Li-li JI  Zheng-tao WANG 《Journal of Zhejiang University. Science. B》2014,15(6):540-547

The present study is designed to investigate the protection by ferulic acid against the hepatotoxicity induced by diosbulbin B and its possible mechanism, and further observe whether ferulic acid augments diosbulbin B-induced anti-tumor activity. The results show that ferulic acid decreases diosbulbin B-increased serum alanine transaminase/aspartate transaminase (ALT/AST) levels. Ferulic acid also decreases lipid peroxide (LPO) levels which are elevated in diosbulbin B-treated mice. Histological evaluation of the liver demonstrates hydropic degeneration in diosbulbin B-treated mice, while ferulic acid reverses this injury. Moreover, the activities of copper- and zinc-containing superoxide dismutase (CuZn-SOD) and catalase (CAT) are decreased in the livers of diosbulbin B-treated mice, while ferulic acid reverses these decreases. Further results demonstrate that the mRNA expressions of CuZn-SOD and CAT in diosbulbin B-treated mouse liver are significantly decreased, while ferulic acid prevents this decrease. In addition, ferulic acid also augments diosbulbin B-induced tumor growth inhibition compared with diosbulbin B alone. Taken together, the present study shows that ferulic acid prevents diosbulbin B-induced liver injury via ameliorating diosbulbin B-induced liver oxidative stress injury and augments diosbulbin B-induced anti-tumor activity.  相似文献   

基于触发词优先级的事件抽取研究     

吉久明  王鑫  李楠  陈锦辉  孙济庆 《现代情报》2016,36(12):46-49

本文将触发词分为时间类和非时间类,对触发词提取算法进行改进,以一定量导电塑料行业新闻为基础语料构建两类触发词词表,并采取时间类触发词优先的事件句识别策略。基于该触发词词表对导电塑料和太阳能行业新闻语料进行事件句识别算法有效性实验,开放测试的召回率和准确率分别超过98%和95%。该结果表明：将触发词进行基于时间特性的分类,并优先使用时间类触发词提取事件句,能取得显著的效果。  相似文献   

基于生命周期理论的企业危机管理动态分析   总被引：6，自引：0，他引：6  

郭际  李南  白奕欣 《科学学与科学技术管理》2006,27(7):116-120

根据生命周期理论将企业发展分为创业阶段、成长阶段、成熟阶段和衰退阶段四个阶段。危机也可分为危机潜伏期、危机征兆期、危机发生期、危机总结期和危机恢复期五个阶段。不同阶段的企业在不同的危机阶段会有不同的注意重点。抓住这些注意重点,可以使企业危机管理更加有效。  相似文献   

基于粒子滤波的无线传感器网络目标跟踪     

季莹  张三同 《中国科技信息》2007,39(21):260-262

本文首先介绍了PF(Particle Filter)和UPF(Unscented Particle Filter)的基本原理,然后针对无线传感器网络(WSN)目标跟踪这一应用方向,采用等级网络结构,参考分布式粒子滤波算法,将UPF应用于WSN单目标跟踪以提高网络跟踪精度,仿真证明UPF较PF在跟踪精度上确实有明显的提高。  相似文献   

自主创新战略与科技中介组织发展   总被引：1，自引：0，他引：1  

纪德尚  孙远太 《学会》2007,(11):3-7

科技中介组织是国家创新体系中的重要组成部分,在国家创新体系中发挥着加速科技成果转化、优化科技资源配置、推动企业科技创新的作用。在实施自主创新战略中,我国科技中介组织由于存在着组织模式趋同、服务功能弱化、运行制度规范缺失等问题,不能适应自主创新战略的要求。在自主创新战略导向下,推动科技中介组织发展的措施包括:建立专业分工与网络协作的组织模式;搭建公共信息平台;提高科技中介人员业务水平;建立信用评价体系;推动科技中介法规建设。  相似文献   

决策树分类算法研究综述   总被引：4，自引：0，他引：4  

季桂树  陈沛玲  宋航 《科技广场》2007,(1):9-12

本文基于决策树分类算法的研究现状,重点介绍了一些极具代表性的算法,包括ID3、C4.5等,对各种决策树分类算法的基本思想进行阐述,分析比较各种典型算法的优点和不足,并对决策树分类算法所面临的问题进行了简要的阐述,为数据分类研究者提供借鉴。  相似文献